CEPHALOMETRIC ANALYSIS 2025 EXM | 121
QUESTIONS | WITH ACCURATE SOLUTIONS!!
What is cephalometry? Answer - Analysis and interpretation of *standardized
radiographs* of the facial bones.
What is a cephalostat? Answer - A head positioning device whereby bilateral
ear rods are placed in the external auditory meati; x-ray passes at the level of
the earbuds.
When was the cephalostat introduced and by who? Answer - Introduced by
Broadbent in 1931.
What patient position do you want for cephalometry? Answer - - natural head
position
- teeth in centric occlusion
- lips at rest
When taking an x-ray, are structures located closer to the film magnified more
or less? Answer - Magnified less.
What are the indications for a posteroanterior cephalometric film? Answer - -
significant facial asymmetries (i.e. large discrepancy in the border of the
mandible)
- severe dental midline discrepancies
,- in general used for qualitative interpretation
In an PA cephalometric film, where does the radiation come from? Answer -
The posterior part.
What are the indications for a lateral cephalometric film (3)? Answer - - to
study longitudinal growth patterns in craniofacial complex
- morphological analysis for diagnosis and treatment planning (sagittal and
vertical, soft tissues, dentition, facial skeleton)
- treatment analysis: functional appliances, surgical treatment, end of
conventional treatment
How are lateral cephalometric films used to study the growth pattern of the
craniofacial complex? Answer - - superimposition of ceph films taken over a
period of time to assess longitudinal growth
Which type of cephalometric film gives you a clear image of the sinuses?
Answer - Lateral ceph
What type of cephalometric film would you use to view the transverse
dimensions of a patient? Answer - PA ceph; can't see transverse dimension
using a lateral ceph.
What are the important mid-sagittal hard tissue landmarks seen on a ceph (9)?
Answer - - Sella S
- Nasion N
- Anterior nasal spine (ANS)
- posterior nasal spine (PNS)
- A point (subspinale)
, - B point (supramentale)
- Pogonion (Pog)
- Menton (Me)
- Gnathion (Gn)
What are the important bilateral hard tissue landmarks seen on a ceph (5)?
Answer - - orbitale (Or)
- porion (P)
- condylion (Co)
- Articulare (Ar)
- Gonion (Go)
What is the Sella (S) landmark? Answer - - midpoint/geometric center of the
sella turcica (hypophyseal/pituitary fossa)
note: it's difficult to be precise in positioning.
Describe the Nasion (N) landmark. Answer - - most anterior point of the
fronto-nasal suture in the median plane (between the nasal and frontal bone)
Describe the anterior nasal spine (ANS) landmark. Answer - - most anterior
bony point on the maxilla at the base of the nose
Describe the anterior nasal spine (PNS) landmark. Answer - - posterior limit of
the bony palate
QUESTIONS | WITH ACCURATE SOLUTIONS!!
What is cephalometry? Answer - Analysis and interpretation of *standardized
radiographs* of the facial bones.
What is a cephalostat? Answer - A head positioning device whereby bilateral
ear rods are placed in the external auditory meati; x-ray passes at the level of
the earbuds.
When was the cephalostat introduced and by who? Answer - Introduced by
Broadbent in 1931.
What patient position do you want for cephalometry? Answer - - natural head
position
- teeth in centric occlusion
- lips at rest
When taking an x-ray, are structures located closer to the film magnified more
or less? Answer - Magnified less.
What are the indications for a posteroanterior cephalometric film? Answer - -
significant facial asymmetries (i.e. large discrepancy in the border of the
mandible)
- severe dental midline discrepancies
,- in general used for qualitative interpretation
In an PA cephalometric film, where does the radiation come from? Answer -
The posterior part.
What are the indications for a lateral cephalometric film (3)? Answer - - to
study longitudinal growth patterns in craniofacial complex
- morphological analysis for diagnosis and treatment planning (sagittal and
vertical, soft tissues, dentition, facial skeleton)
- treatment analysis: functional appliances, surgical treatment, end of
conventional treatment
How are lateral cephalometric films used to study the growth pattern of the
craniofacial complex? Answer - - superimposition of ceph films taken over a
period of time to assess longitudinal growth
Which type of cephalometric film gives you a clear image of the sinuses?
Answer - Lateral ceph
What type of cephalometric film would you use to view the transverse
dimensions of a patient? Answer - PA ceph; can't see transverse dimension
using a lateral ceph.
What are the important mid-sagittal hard tissue landmarks seen on a ceph (9)?
Answer - - Sella S
- Nasion N
- Anterior nasal spine (ANS)
- posterior nasal spine (PNS)
- A point (subspinale)
, - B point (supramentale)
- Pogonion (Pog)
- Menton (Me)
- Gnathion (Gn)
What are the important bilateral hard tissue landmarks seen on a ceph (5)?
Answer - - orbitale (Or)
- porion (P)
- condylion (Co)
- Articulare (Ar)
- Gonion (Go)
What is the Sella (S) landmark? Answer - - midpoint/geometric center of the
sella turcica (hypophyseal/pituitary fossa)
note: it's difficult to be precise in positioning.
Describe the Nasion (N) landmark. Answer - - most anterior point of the
fronto-nasal suture in the median plane (between the nasal and frontal bone)
Describe the anterior nasal spine (ANS) landmark. Answer - - most anterior
bony point on the maxilla at the base of the nose
Describe the anterior nasal spine (PNS) landmark. Answer - - posterior limit of
the bony palate
